Cycle Troubleshooting Guide - LG LM-1460H2L Service Manual

Cycle Troubleshooting Guide

Trouble analysis
1. Check temperature difference between intake and discharge air and operating current.
Temp. Difference
Operating Current
Notice:
Temperature difference between intake and discharge air depends on room air humidity. When the room air
humidity is relativery higher, temperature difference is smaller. When the room air humidity is relatively lower
temperature difference is larger.
2. Check temperature and pressure of refrigeration cycle.
Suction pressure Temperature
(Compared with (Compared with
the normal value) the normal value)
Higher
Lower
Notice:
1. The suction pressure is usually 4.5~6.0 kg/cm
2. The temperature can be measured by attaching the thermometer to the low pressure tubing and wrap it with
putty.
All manuals and user guides at all-guides.com
Temp. difference : approx. 0°C
Current : less than 80% of
rated current
Temp. difference : approx. 8°C
Current : less than 80% of
rated current
Temp. difference : less than 8°C
Current : over the rated
current
Temp. difference : over 8°C
Cause of Trouble
High Defective compressor
Defective 4-way reverse valve
Normal Excessive amount of
refrigerant
Insufficient amount of
Higher refrigerant(Leakage)
Clogging
G at normal condition.
2
All amount of refrigerant leaked out.
Check refrigeration cycle.
Refrigerant leakage
Clog of refrigeration cycle
Defective compressor
Excessive amount of refrigerant
Normal
Current is low.
High pressure does not quickly
rise at the beginning of operation.
Current is low.
Current is low.
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Description